The suprahepatic bull’s-eye sign is usually the typical imaging manifestation of secondary liver tumors.
The majority of secondary liver tumors originate from the GI tract, with colorectal cancer presenting most commonly as liver metastases. Tumors from other sites can metastasize to the liver via transportal vein metastasis, transhepatic artery metastasis, translymphatic metastasis, and direct invasion.
Imaging can help to detect liver metastases and to assess whether they are secondary to the tumor. On enhanced CT of the abdomen, the tumor is enhanced, well defined, and more dense in the center than in the periphery, which is called the bull’s-eye sign.
The bull’s-eye sign on the liver also requires patients to undergo a comprehensive examination in a regular medical institution to clarify the specifics of the primary tumor and the secondary tumor in the liver, and to be treated under the guidance of a professional doctor.